Ramsey Electronics BS1 Instrukcja Obsługi Pobierz pdf (Strona 28)

SG7• 28

 3. Line up the main seams of both cans in a straight line. (This is only

for a better-looking job.)

 4. With the two cans perfectly joined together, use several strips of

masking or electrical tape to hold the rims steady.

 5. In the centers of the exposed non-taped areas, make good, solid

solder joints at least a half inch long.

 6. Remove all tape and re-clean the areas to which the tape had

adhered.

 7. Patiently solder a solid seam around the entire perimeter of the joined

can rims.

 8. As you work, believe that it can be done and that it should be done!

Yes, it CAN be done!

To keep it from being a frustrating ordeal, you may get some practice on two

other un-needed cans before working on the SG7 itself. However, be sure to

do the preparatory cleaning steps on the test cans just as thoroughly, or the

solder will just roll up into little balls and laugh at you. (Also, you find that

solder can adhere to the thinner can surface much more easily than to the

reinforced rims!) The idea is to discover just how much heat you need and

how slowly or quickly the soldering tip can be moved. Again, BE SURE to

make the can rims clean and shiny before soldering.

A miniature hobby torch with a pin-point flame is an ideal tool. A standard

propane torch seems to be entirely TOO MUCH even at its lowest setting. A

soldering gun should work well, but I was getting better results with a 25-

watt pencil iron than from a 75-watt gun. I also tried one of those portable

butane soldering pens, but I would not recommend buying that tool just for

this job.

A second soldering pencil can be used by a helper to intensify the heating of

the can rims. (If you would like to be rebellious for once on an electronics

project, and know that you can do a better job with solid or acid core solder,

paste and torch, that's just fine - on THIS part of the SG7 project only! And,

if you're already good at light welding-brazing, or know someone who is,

then go for it!)

After the cans are soldered together, any rough spots in the soldered seam

can be smoothed out, and the unit can then be painted or covered with

contact paper. We remind you again not to do ANY painting around the

oscillator assembly until correct operation is verified. You may wish to add a

handle or tripod mount. These can be glued to the outside of the can, but a

couple of small screwheads protruding within the can assembly will not

disturb SG7 performance. The plastic lid of a coffee can will fit the open end

of any of our recommended can combinations and will keep dirt and

moisture out of the inside.

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Ramsey Electronics BS1 Instrukcja Obsługi Strona 28